Top Definition
THE SUDDEN SPONTANEOUS RUSH OF EXCITEMENT THAT OCCURS AFTER SOMETHING EXTRAORDINARY HAS HAPPENED. The thrillgasm may cause someone to slap their friend in the face, jump up and down alot and not give a fuck, scream loudly, or any spontaneous movement that illustrates excitement. In some extreme cases it may even cause an orgasm.
WHEN THE GIANTS WON THE SUPERBOWL, NATE HAD A THRILLGASM

*Geek 1*- Last night I completed my quest to beat all the Zelda games. When I did, I had a thrillgasm.
*Geek 2*- Did you get spooge all over your sheets?
*Geek 1*- UHHHH Yeah. It was pretty extreme.

BRIAN OLDFIELD ONCE SAID THE WORD IN AN INTERVIEW WITH A REPORTER.
by Black Velvet April 06, 2008

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